Troy-Bilt 21A-630B063 Owner's manual

Brand: Troy-Bilt

Model: 21A-630B063

Category: Mini tillers

Type: Owner's manual

This manual is also suitable for

0 TRnV BILT'"

Operator's Manual

Rear-tine Tiller Models

630B--Tufty _

634F--Bronco TM

634B--Super BroncoTM

Mode1634B Shown

IMPORTANT:READ SAFETY RULES AND INSTRUCTIONS CAREFULLY

Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-cov-

ered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a

spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law

(Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester

for the muffler is available by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.

TROY-BILT LLC, P.O. BOX 361131, CLEVELAND, OH 44136-0019

PRINTED IN USA FROM NO. 770-10594A

(12/2001 )

TABLE OF CONTENTS

Content Page

Calling Customer Support .................................................... 2

Safety ................................................................... 3

Assembly ................................................................. 6

Features and Controls ....................................................... 10

Operation ................................................................ 12

Maintenance .............................................................. 17

Off-Season Storage ........................................................ 21

Troubleshooting ........................................................... 22

Parts List ................................................................. 23

Warrany Information ........................................................ Back Cover

FINDINGMODELNUMBER

This Operator's Manual is an important part of your new Rear-tineTitter. It will help you assemble, prepare and main-

tain the unit for best performance. Please read and understand what it says.

Before you start assembling your new equipment, please locate the model plate on the equipment and copy the infor-

mation from it in the space provided below. This information is very important if you need help from our Customer

Support Department or an authorized dealer.

You can locate the model number by looking at the rear surface of the tine shield. A sample model plate is

explained below. For future reference, please copy the model number and the serial number of the equipment

in the space below

O BILT" TROY-BILT LL(

P. O. BOX 361131

www.troybilt.com CLEVE_ND,OH_136

330-558-7220

• 866-840-648_

Copy Model Number Here

Copy Serial Number Here

ENGINEINFORMATION

The engine manufacturer is responsible for all engine-related issues with regards to performance, power-rating, speci-

fications, warranty and service. Please refer to the engine manufacturer's Owner's/Operator's Manual packed sepa-

rately with your unit for more information.

CALLINGCUSTOMERSUPPORT

If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance

of this unit, please call the Customer Support Department.

Call 1- (330) 558-7220 or 1- (866) 840-6483 to reach a Customer Support representative. Please have

your unit's model number and serial number ready when you call. See previous section to locate this

information. You will be asked to enter the serial number in order to process your call ..

Safety

This machine meets voluntary safety standard

B71.8 - 1996, which is sponsored by the Outdoor

Power Equipment Institute, Inc., and is published

by the American National Standards Institute.

ForwardClutchBail

ReverseClutch

Control(Models

634F/634a)

WARNING

The engine exhaust from this product contains

chemicals known to the State of California to cause

cancer, birth defects or other reproductive harm.

DepthRegulator

TineHood Flap

SafetyAlert Symbol

This is a safety alertsymbol. It is used in this

manualand on the unit to alertyou to poten-

tial hazards. Whenyou seethis symbol, read

and obeythe messagethat follows it. Failure

to obeysafety messagescould result in

personal injury or property damage.

Standard-Rotating-

Tines(SRT)

WheelDrivePin

(on eachwheel)

Figure1-1: Tillerfeaturesandcontrols(5.SHPModelshown),Seeseparate

EngineOwner'sManualtoidentifyenginecontrols.

Training

1. Carefullyreadthis Owner's

Manual,the separateEngine

Owner's Manual,and any

other literature you may receive.Bethor-

oughlyfamiliar with the controls andthe

proper use ofthe tiller and its engine.

Knowhow to stop the unit and disengage

the controls quickly.

2. Neverallow children to operatethe

tiller. Neverallow adultsto operatethe

tiller without proper instruction.

3. Keepthe areaof operationclear ofall

persons,particularly children and pets.

4. Keepin mind that the operatoror user

is responsiblefor accidents or hazards

occurring to other people,their property,

and themselves.

Preparation

1. Thoroughly inspectthe areawhere the

tiller is to be usedand remove all foreign

objects.

2. Be sureall tiller controls are released

and both wheels are in the Wheel Drive

position beforestarting the engine.

3. Do not operatethe tiller without

wearing adequateouter garments. Avoid

loosegarments or jewelry that could get

caught in moving parts.

4. Do not operatethe tiller when barefoot

or wearingsandals, sneakers,or light

footwear. Wear protective footwear that

will improve footing on slippery surfaces.

5. Do not till near underground electric

cables,telephonelines, pipesor hoses. If

in doubt, contact your telephoneor utility

company.

6. Warning: Handlefuel with care; it is

highlyflammable and its vaporsare explo-

sive. Takethe following precautions:

a. Storefuel in containers specifically

designedfor this purpose.

b. Thegascapshall neverbe removed

or fuel addedwhilethe engineis run-

ning. Allowthe engineto coolfor

severalminutesbeforeaddingfuel.

¢. Keepmatches,cigarettes, cigars,

pipes, openflames, and sparks

away from thefuel tank and fuel

container.

d. Fillfuel tank outdoorswith extreme

care. Neverfill fuel tank indoors.

Useafunnel or spout to prevent

spillage.

Replaceall fuel tank and container

caps securely.

If fuel is spilled, do notattempt to

start the engine, but movethe

machine awayfrom thearea of

spillageand avoid creating any

source of ignition until fuel vapors

havedissipated.

7. Never makeadjustmentswhen engine

is running (unless recommendedby

manufacturer).

Operation

1. Donot put handsor feet nearor under

rotating parts.

2. Exerciseextremecaution when on or

crossing graveldrives, walks, or roads.

Stay alertfor hidden hazardsor traffic. Do

notcarry passengers.

3. After striking a foreign object,stop the

engine, removethe wire from the spark

plug wire and prevent it from touching the

spark plug.Thoroughly inspect the

machinefor anydamageand repair the

damagebeforerestarting and operating

the machine.

4. Exercisecaution to avoid slipping or

falling.

5. If the unit should start to vibrateabnor-

mally, stop the engine,disconnect the

spark plug wire and prevent it from

touching the spark plug,and checkimme-

diatelyfor the cause. Vibration isgener-

ally a warning oftrouble.

6. Stopthe engine,disconnect the spark

plug wire and prevent it from touching the

spark plug, wheneveryou leavethe oper-

ating position, before uncloggingthe tines,

or when making any repairs, adjustments

or inspections.

7. Takeall possible precautionswhen

leavingthe machine unattended. Stopthe

engine. Disconnectthe spark plug wire

and move it awayfrom the spark plug. Be

surethat both wheelsare in the Wheel

Drive position.

8. Beforecleaning,repairing, or

inspecting, stop the engineand make cer-

tain all moving parts havestopped. Dis-

connectthe spark plug wire andprevent it

from touching thespark plug to prevent

accidentalstarting.

9. Theflap on the tine hood must bedown

when operating thetiller.

lB. Neverusethe tiller unless proper

guards, plates,or other safetyprotective

devicesare in place.

11. Donot run the engine in an enclosed

area. Engineexhaustcontains carbon

monoxide gas,a deadlypoison that is

odorless,colorless, and tasteless.

12. Keepchildren and petsaway.

13. Neveroperatethetiller underengine

powerif thewheels are in the Freewheel

position.Inthe Freewheelposition, the

wheels will not hold thetiller backand the

revolving tines could propel the tiller

rapidly, possibly causing loss of control.

Always engagethewheels with the wheel

drive pins in the WheelDrive position

beforestarting the engine or engaging the

tines/wheels with the Forward ClutchBail

(all models) or the ReverseClutchcontrol

(Models 634F/634B only).

14. Beawarethatthetiller may unex-

pectedlybounceupwardor jumpforward

ifthe tinesshouldstrike extremelyhard

packedsoil, frozenground,or buried

obstacleslike largestones,roots,or

stumps.If in doubtaboutthe tilling con-

ditions,alwaysusethefollowing

operatingprecautionsto assistyouin

maintainingcontrolofthetiller:

a. Walk behindandto oneside ofthe

tiller, usingonehandon thehan-

dlebars. Relaxyourarm, butusea

securehandgrip.

b. Useshallowerdepthregulatorset-

tings, workinggraduallydeeper

with eachpass.

c. Useslowerenginespeeds.

d. Clearthe tilling area ofall large

stones,rootsand otherdebris.

e. Avoidusingdownwardpressureon

the handlebars.If need be, use

slight upwardpressureto keepthe

tines fromdiggingtoo deeply.

f. Beforecontactinghardpackedsoil

at the end ofa row, reduceengine

speedand lift the handlebarsto

raise thetines outofthe soil.

g. In an emergency,stopthe tines and

wheels byreleasingwhichever

clutchcontrolis engaged.Do not

attempttorestrainthetiller.

15. Donot overloadthe tiller's capacity by

attempting to till too deeplyattoo fast a

rate.

16. Neveroperatethetiller at high trans-

port speeds on hard or slippery surfaces.

Look behind and usecarewhen backing

up.

17. Donot operatethe tiller on a slope

that is too steepfor safety.When on

slopes,slow down and make sureyou

havegood footing. Neverpermit the tiller

to freewheeldown slopes.

18. Neverallow bystanders nearthe unit.

19. Onlyuseattachments and accessories

that are approvedby the manufacturer of

the tiller.

20. Usetiller attachments and accessories

when recommended.

21. Neveroperatethetiller without good

visibility or light.

22. Neveroperatethetiller if you are tired;

or underthe influence ofalcohol, drugs or

medication.

23. Operatorsshall not tamper with the

engine-governorsettings on the machine;

the governor controls the maximum safe

operatingspeedto protect theengine and

all moving parts from damagecaused by

overspeed. Authorized service shall be

sought if a problem exists.

24. Donot touch engineparts which may

be hot from operation. Let parts cool down

sufficiently.

25. Pleaseremember:You canalways

stop the tines and wheels by releasingthe

ForwardClutch Bail or on Models 634F

and 634Bthe ReverseClutchcontrol,

(whichever control is engaged),or by

moving the ignition switch and/or throttle

control leveron the engineto "OFF"or

"STOP".

26. To load or unloadthe tiller, seethe

instructions in Section 4 of this Manual.

27. Useextremecaution when reversing

or pulling the machinetowards you.

28. Start the enginecarefully according to

instructions and with feet well awayfrom

thetines.

29. Never pick up or carry a machine

while theengine is running.

MaintenanceandStorage

1. Keepthe tiller, attachments and acces-

sories in safeworking condition.

2. Checkall nuts, bolts, and screws at

frequent intervalsfor proper tightness to

be surethe equipment is in safe working

condition.

3. Neverstore the tiller with fuel in the fuel

tank inside a building where ignition

sourcesare present such as hot water and

spaceheaters,furnaces, clothesdryers,

stoves,electric motors, etc.). Allow the

engineto cool beforestoring the unit in

anyenclosure.

4. To reducethe chancesof a fire hazard,

keepthe engine free of grass, leaves,or

excessivegrease.

5. Storegasoline in a cool, well-ventilated

area,safelyaway from any spark- or

flame-producing equipment. Storegaso-

line in an approvedcontainer, safelyaway

from the reachof children.

6. Referto the Maintenancesections of

this Manualand the separateEngine

Owner's Manualfor instructions if the unit

is to bestored for an extended period.

7. Neverperform maintenancewhile the

engine is running orthe spark plug wire is

connected,exceptwhen specifically

instructed to do so.

8. If thefuel tank hasto be drained,do

this outdoors.

Decals

Foryour safety and the safety of

others, various safety and opera-

tional decalsare located on your

unit (seeFigure1-2).

Keepthe decals cleanand legible at

all times. Contactyour local ser-

vice dealeror the factory for

replacements ifany decalsare

damagedor missing.

Referto the Parts List pagesin this

Manualfor decallocations, descrip-

tions and part numbers.

ForwardClutchBail

OperatingInstruction

Starting Stabilization

Message (onengine)

ReverseClutchControl

OperatingInstruction

(Models 634F/634B)

Messages

Rot SurfacesWarning

(onbelt cover)

Figure1-2: Locationofsafety andoperatingdecals(5.5HP Model shown).

OperatingSymbols

Varioussymbols (shown here,with word

descriptions)may beusedon the tillerand

engine. Your unit may not haveall of the

symbols.

FAST SLOW STOP

H I÷1 R

CHOKE CHOKE REVERSE '_'

ROTATING

ON OFF TINES

41E-->

TILLERDIRECTION LEVERDIRECTION

BAIL BAIL

ENGAGED DISENGAGED

TO AVOID SERIOUS INJURY:

• READTHEOWNER'SMANUAL.

• KNOWLOCATIONSANDFUNCTIONSOFALLCONTROLS.

• KEEPALL SAFETYDEVICESANDSHIELDSIN PLACEANDWORKING.

• NEVERALLOWCHILDRENORUNINSTRUCTEDADULTSTO OPERATETILLER.

• SHUTOFFENGINEANDDISCONNECTSPARKPLUGWIREBEFOREMANUALLYUNCLOG-

GINGTINES ORMAKINGREPAIRS.

• KEEPBYSTANDERSAWAYFROM MACHINE.

• KEEPAWAY FROMROTATINGPARTS.

• USEEXTREMECAUTIONWHENREVERSINGORPULLINGTHEMACHINETOWARDSYOU.

Assembly

To prevent personal injury or property

damage, do not start the engine until

all assembly steps are complete and

you have read and understand the

safetyand operatinginstructionsin this

manual.

INTRODUCTION

Carefullyfollow these assembly stepsto

correctly prepareyour tiller for use. It is

recommendedthat you readthis Section

in its entirety before beginning assembly.

NOTE:Varioustiller models are presented

in this Manual.Useonlythe information

appropriate for your tiller model.

INSPECTUNIT

Inspect the unit and carton for damage

immediately after delivery. Contactthe

carrier (trucking company) if you find or

suspectdamage. Inform them of the

damageand request instructions for filing

a claim. To protect your rights, put your

claim in writing and maila copy to the car-

rier within 15days after the unit hasbeen

delivered.Contactthe factory if you need

assistance in this matter.

TOOLS/MATERIALSNEEDED

FORASSEMBLY

(1) 3/8" open-endwrench*

(2) 7/16"open-end wrench*

(2) 1/2"open-end wrench*

(2) 9/16"open-end wrench*

(1) Largeadjustablewrench (Models

634F/634Bonly)

(1) Scissors(to trim plastic ties)

(1) Ruler(for belt tension check)

(1) Blockof wood (to support tiller

when removing wheels)

(1) Tire pressure gauge (for models with

pneumatictires)

(1) Cleanoilfunnel

(1) Motoroil. Referto the EngineOwner's

Manualfor oil specificationsand

quantityrequired.

* Adjustablewrenches may be used.

ASSEMBLYSTEPS

STEP1: UNPACKINGINSTRUCTIONS

NOTE: While unpacking,do not severely

bend any control cables.

1. Thetiller weighs approximately 133 Ibs.

Do not attempt to remove it from the ship-

ping platform until instructed to do so in

theseAssembly steps.

2. Removeany packagingmaterialfrom

the carton. Removeanystaplesfrom the

bottom of the carton and removethe

carton from the shipping platform.

3. Removeall unassembledparts andthe

separatehardwarebag from the carton.

Checkthat you havethe items listed in the

LooseParts List (contact your localdealer

or the factory itemsare missing or dam-

aged). NOTE: Usethe screw lengthtem-

plate (Fig. 2-1)to identify screws.

LoosePartsList

Qty. Description

1 HandlebarSupport (seeA, Fig.2-2)

1 HandlebarAssembly(seeK,Fig.2-2)

Hardwarebag contents:

1 Slottedhd. screw, #10-24 x 2"

1 Hexhd. screw, 1/4-20 x 1-1/4"

6 Hexhd. screw, 5/16-18 x 1-1/2"

2 Hexhd. screw, 3/8-16 x 3/4"

2 Flatwasher,3/8"

6 Split Iockwasher,5/16"

1 HexIocknut, 1/4"-20

6 Hexnut, 5/16"-18

1 Hexnut,#10-24

2 HexIocknut, 3/8"-16

1 Spring, cable(seeW, Fig. 2-5)

1 Bracket,forward clutch cable (see

P,Fig.2-4)

2 LockWasher,3/8

2 *Self-tapping screw,1/4-20 x 1/2"

1 *Bracket, reverseclutch cable

*Model 634F& 634B only

IMPORTANT:Motor oil must beaddedto

the enginecrankcase beforethe engineis

started. Follow the instructions in this

Assembly Section and in the separate

Engine Owner's Manual.

NOTE:LEFTand RIGHTsides of the tiller

areas viewed from the operator's position

behind the handlebars.

Figure2-1: Toidentitylengthofscrews,

placescrewontemplateasshownandmea-

suredistancebetweenbottomofscrewhead

andtipofscrew.

STEP 2: ATTACHHANDLEBAR

1. Looselyattach the legsof the handlebar

support (A, Fig. 2-2) to the inner sides of

the tiller frame usingtwo 3/8"-16 x3/4"

hexhd. screws (B), 3/8"flat washers (C),

3/8" lockwashers (GG)and 3/8"-16 hex

Iocknuts (D).

2. Thereare three heightadjustment holes

in the two handlebarsupport brackets (E

and F,Fig. 2-2). Usea setting that will

position the handlebarsat approximately

waist levelwhenthe tines are 3"-4"intothe

soil. Loosely attachthe support brackets

to the handlebarsupport (A)using two

5/16"-18 x 1-1/2" screws (G),5/16"split

Iockwashers(H) and 5/16"-18 hexnuts (I).

NOTE: If a support bracketwill not move,

loosenattaching screw (J) and nut.

3. Attach the handlebarassembly (K) to

the handlebarsupport (A) using four

5/16"-18 x 1-1/2" screws (G),5/16"split

Iockwashers(H) and 5/16"-18 hexnuts (I).

Tighten the four screws securely.

4. Tighten all handlebar mounting hard-

ware securely.

STEP3: MOVE TILLER OFF

SHIPPING PLATFORM

To roll the tiller off the shipping platform,

put the wheels in FREEWHEEL,asfollows:

1. Placea sturdy block underthe trans-

mission to raiseone wheelabout 1" off the

ground.

Fig.2-3: Wheelin FREEWHEELposition

(wheeldrivepinthroughwheelshaftonly).

Fig.2-2:Attachhandlebar(5.5HPModelshown).

2. Removethe hairpin cotter (L, Fig. 2-3)

and wheel drive pin (M) from the wheel

hub (0) andwheelshaft (N).

3. Slide the wheelfully inward onthe

wheel shaft (N, Fig. 2-3). Reinstallthe

wheel drive pin (M) through the wheel

shaft only (not through the wheel hub).

Securethe wheeldrive pin with the hairpin

cotter (L), pushingthe hairpin cotter in as

far as it will go. Thewheelshould now

spin freely (freewheel) on thewheel shaft.

Repeatwith the other wheel.

4. Usethe handlebarto roll the tiller to a

flat area.

IMPORTANT:Beforestarting theengine,

the wheels must be placedin the WHEEL

DRIVEposition (pins through wheel hubs

and wheelshaft). This procedureis

described in WheelDrive Pinsin Section3.

' STEP4: INSTALLFORWARD

CLUTCHCABLE

1. Attach the forward clutch cable bracket

G (P, Fig.2-4) to the handlebarsupport (A)

_-_17" with a1/4"-20 x 1-1/4" hex hd. screw(R)

and 1/4"-20 hex Iocknut(S). Tighten

securely.

H I 2. Carefullyunwrapthe forward clutch

cable(cablewithout an attachedknob)

from its shipping position andslide the

thin cablewire (T, Fig.2-4) into the slot in

the cablebracket. Pushthe cablecon-

nector (U, Fig. 2-4) up through the hole in

the bracketuntil the groove in the con-

nector snaps into place.

Fig.2-4:Installingforwardclutchcablebracketandcable,

3. Insertthe #10-24 x 2" slotted hd.screw

(V, Fig.2-5) downthrough the hooked

end of the cablespring (W) until the screw

threads extendthrough the spring.

4.Threadthe#10-24 hexnut (Z, Fig. 2-5)

halfwayonto the screw (V).

5. Threadthe screw (V) into thecable

adjuster (X).

6. Hookthe cablespring (W, Fig.2-6) into

the V-shapedbend in the ForwardClutch

Bail (Y).

7. Checkfor correct tension on the for-

ward drive belt bytaking two measure-

ments ofthe cablespring, as follows:

a. With the Forward ClutchBail (Y, Fig.2-

6) in an open (released)position, mea-

surethe length ofthe cablespring (W)

from the outermost coil to the outer-

most coil.

b. Squeezethe ForwardClutch Bail against

the handlebar(seeFig.2-7) and re-

measurethe spring length. Thebelt

tension is correct ifthis secondmea-

surement is between1/16"to 3/16"

longer thanthe first measurement. If

so, turn the hexnut (Z, Fig.2-7) tightly

against the cableadjuster (X)while pre-

venting the cableadjuster from turning.

c. If the spring lengthis incorrect, you

must adjust the cabletension as

described in Checkingand Adjusting

Forward Drive Belt Tensionin Section5.

Incorrect cabletension can result in belt

slippage (cabletension too loose), or

unintentional tine movementwhen the

clutch bail is in Neutral (cabletension

too tight).

Fig.25: Cable

springand

adjuster,

Fig,2-6:Attachforward

clutchcablespringto

forwardclutchbail.

Fig.2-7: Tocheckforwardbelttension,taketwomeasurementsofthelengthofthecoilsin

thespring- firstwiththebailopen,thenwiththebailheldagainstthehandlebar,

STEP5: INSTALLREVERSECLUTCH

CABLE(MODELS634FAND634B

ONLY)

1. Unwrap the reverseclutch cable(CC,

Fig.2-8 and Fig.2-9) from its shipping

position and route it up to the handlebar.

Besurethat the cableis routed beneath

the Forward Clutch Bail.

2. Using the two self-tapping screws (AA,

Fig.2-8) securethe reversecable

mounting bracket(BB)to the handlebars,

as shown.

3. Insertthe cable(CC,Fig.2-8) through

the slot in the cablebracketand position

the flat side ofthe threadedassemblynext

to the flat side of the hole. Slide the hex

nut (DD) upthe cableand tighten it

securely.

4. Fastenthe reverseclutch cable to the

left side handlebarwith a cabletie (EE,

Fig.2-9).

5. Testthe function of the reverseclutch

bypulling outand releasingthe cable

knob. The knobshould returnto its neu-

tral position (resting against bracket). If it

doesn't, contact your local dealeror the

factory for technical assistance.

FlatSide

Fig.2-8:Installreversecablebracketand

reverseclutchcable,

Fig. 2-9: Routereverseclutchcable (CC)as

shown. Attachwith cabletie (EE).

STEP6:CHECKLEVELOF

TRANSMISSIONGEAROIL

Thetransmission was filled with gear oil at

the factory. However,youshould check

the gear oil levelatthis time to makecer-

tain it is correct.

IMPORTANT:Do notoperatethe tiller if

the gear oil levelis low. Doingso will

result in severedamageto the transmis-

sion components.

1. With the tiller on level ground, pull the

Depth Regulator Lever(FF,Fig. 2-10) back

and then all the way up until the lowest

notch in the leveris engaged.

2. Removethe oil fill plug (GG,Fig.2-11)

from the transmission housing cover and

locate the main drive shaft situated inside

the housing.

3. Thegear oil level is correct if the gear

oil is approximately halfwayup the side of

the main drive shaft.

4. If the oil levelis low, add gearoil by

referring to A. ToCheckthe Transmission

GearOil Level in Section5.

Fig. 2-10: AdjustDepthRegulatorLever.

Fig.2-11:Removegearoilfillplug.

STEP7: ADDMOTOROIL

TO ENGINE

Thetiller is shipped withoutoil in the

engine.

IMPORTANT: Donot startthe engine

without first adding motor oEI.Severe

enginedamagewill result if the enginezs

run without oil.

1. Referto the separateEngineOwner's

Manualfor engine oil specifications and

capacities.

2. With the tiller on levelground, move the

Depth Regulator Lever/FF. Fig. 2-10) up

or down until the engine is level.

3. Add motor oil as described in the

EngineOwner's Manual.

4. Movethe Depth Regulator Leverall the

way down until the hEghestnotch is

engaged. This placesthe tines in the

"travel" position which allows thetiller to

be moved without thetines touching the

ground.

STEP8: CHECKHARDWARE

FORTIGHTNESS

Checkall nuts and screws for tightness.

STEP 9: CHECKAIR PRESSURE IN

TIRES (units with pneumatic tires)

Ontires equEppedwith airvalves, check

the a_rpressure with a tire gauge. Deflate

or inflate thetires equally to 15 to 20 PSI

(pounds per square inch). Besure that

9othtires are inflated equallyor the unit

will pull to one side.

IMPORTANT:This completes the assembly

steps. Beforeoperating your tiller, make sure

you readthe following sections in this Manual.as

well asthe separate EngineOwner's Manual:

• Section1: Safety

• Section3: Featuresand Controls

• Section4: Operation

T FeaturesandControls

Before operating your machine, care-

fully read and understand all safety,

controls and operating instructions in

this Manual, the separate Engine

Owner's Manual, and on the decals on

themachine.

Failure to follow theseinstructionscan

resultin seriouspersonalinjury.

INTRODUCTION

This Sectiondescribes the location and

function of the controls on your tiller.

Referto the following Section, Operation

for detailed operatinginstructions.

Practiceusing thesecontrols, with the

engineshut off, until you understandthe

operationof the controls and feelconfi-

dentwith eachof them.

ENGINE CONTROLS

Referto the engine manufacturer's Engine

Owner's Manual(included in the tiller liter-

ature package)to identify thecontrols on

your engine.

IMPORTANT:Thecontrol for stopping the

engine is locatedon the engine.

WHEEL DRIVE PINS

Eachwheel is equippedwith a wheeldrive

pin (A, Figures3-2 and 3-3) that secures

the wheelto the wheelshaft (B). The

wheels can be positioned in eithera

WHEELDRIVEor a FREEWHEELmode.

Never allow either of the wheels to be

in the FREEWHEELposition when the

engine is running. Always put both

wheels in the WHEEL DRIVE position

beforestartingthe engine.

Failure to comply could cause loss of

tiller control, propertydamage, or per-

sonalinjury.

Beforestarting the engine,put both

wheels in theWHEELDRIVEposition by

inserting the wheeldrive pinsthrough the

wheel hubs andthe wheel shaft. Doingso

"locks" the wheels to thewheel shaft,

causingthe wheels to turn wheneither the

ForwardClutchBail

ReverseClutch

Control(Models

634F/634B)

ulator

Height

Adjustment

WheelDrivePin

(oneachwheel)

Figure3-1: Tillerfeaturesandcontrols(5.5HPModelshown),SeeseparateEngineOwner's

Manualtoidentifyenginecontrols.

Forward Clutch Bail (all models) or the

ReverseClutch Control (Models 634Fand

634B) is engaged.

Usethe FREEWHEELmode only whenthe

engine is not running. In FREEWHEEL,the

wheeldrive pinsare placed onlythrough

the holes in the wheelshaft (not thewheel

hubs), thus allowing thewheels to turn

freely when you manually move the tiller.

To placethewheels in WHEELDRIVEor

FREEWHEEL:

1. Stop engine,disconnectspark plug wire

from spark plugand allow engineto cool.

Do not place tiller on its side when

changingwheel drive positions. Doing

so couldresult in gasoline leakingfrom

thefuel tank.

Failure to follow this instruction could

result in personal injury or property

damage.

2. Raiseonewheel about one inch off the

ground and placea sturdy support under

the transmission.

3. Removehairpin cotter (C, Figures3-2

and 3-3) from wheel drive pin (A).

4. FORWHEELDRIVEMODE(Figure3-2):

Slide wheel outward and align holesin

wheel hub (D, Figure3-2) andwheel shaft

(B). Insert wheeldrive pin (A) through

wheel hub (D) and wheelshaft (B). Secure

wheel drive pin with hairpin cotter (C) by

pushing hairpin cotter in as far as it will

go. Repeatwith the other wheeland then

removethe support from beneaththe

transmission.

Figure3-2: WHEELDRIVE position,

5. FORFREEWHEELMODE(Figure3-3):

Slidethe wheel inward and insert the

wheel drive pin (A, Figure3-3) only

through the hole in the wheelshaft (B).

Securewheel drive pin with hairpin cotter

will go. Repeatfor the other wheeland

then removethe support from beneaththe

transmission.

Figure3-3: FREEWHEELposition.

Beforestartingengine, besurethat both

wheels are in WHEEL DRIVE position.

See WheelDrivePins for instructions.

Engaging the Forward Clutch Bail or

Reverse Clutch Control (if equipped)

when the wheels are not in WHEEL

DRIVE could allow the tines to rapidly

propelthetiller forwardor backward.

Failure to comply could cause loss of

tiller control, propertydamage, or per-

sonalinjury.

FORWARD CLUTCH BAIL

TheForward ClutchBail (E, Figure3-4)

controls the engagementof forward drive

to the wheelsand tines.

To operatetheForwardClutchBail:

1. Putwheels inWHEELDRIVEposition

(see"WARNING"statementabove).

2. Lift and hold the clutch bail (E, Figure

3-4) againstthe handlebarto start the

wheelsand tines rotating in a forward

direction.

3. Releasethe clutch bailto disengage

(stop) the wheelsand tines (the engine

will continue to run).

REVERSECLUTCHCONTROL

(Models634F/634Bonly)

TheReverseClutch Control (F, Figure3-4)

controls the engagementof reversedrive

to the wheelsand tines. Thereversing

featureis usedformaneuveringthetiller

only- neverengagethetines in the

groundwhile operatingin reverse.

• Use extreme caution when reversing

or pulling the machine towards you.

Lookbehindtoavoidobstacles.

• Neverattemptto till in reverse.

Failure to follow this warning could

result in personal injury or property

damage.

To operatethe ReverseClutchControl:

1. Putwheels in WHEELDRIVEposition

(see"WARNING"statementat the left).

2. Stopall tiller motion by releasingthe

ForwardClutch Bail.

3. Lift the handlebaruntil the tines clear

the ground, look behind you to avoid any

obstacles,and then pull the control knob

(F, Figure3-4) out. Thewheels and tines

will rotate in a reversedirection.

4. Releasethe control knob to disengage

(stop) the wheelsand tines (the engine

will continue to run).

Figure3-4: Allmodelshavea Forward

ClutchBail(E). OnlyModels634F/634B

havea ReverseClutchControl(F).

DEPTH REGULATOR LEVER

This lever(G,Figure3-5) controls the

tilling depthof thetines. Pull the lever

backand slide it up or down to engagethe

notched height settings.

The"travel position" (highest notch) raises

the tines approximately 1-1/2"off the

ground, allowing thetiller to be moved

without the tines contacting the ground.

This setting should also be usedwhen

starting the engine.

Moving the leverupwardwill increasethe

tilling depth. The lowest notch allows a

tilling depthof approximately 6",

depending on soil conditions. Forbest

results, alwaysbegin tilling at a very

shallow depth setting and gradually

increasethe tilling depth.

• Do not attempt to till too deeply too

quickly. Gradually work down to

deepertilling depths.

• Place the Depth Regulator Lever in

the '*travel" position before starting

the engine. This position prevents

the tines from touching the ground

until youare readytobegintilling.

Failure to follow this warning could

result in personal injury or property

damage.

TravelPosition

Settings

Figure3-5:DepthRegulatorLever(G).

HANDLEBAR HEIGHT ADJUSTMENT

Thehandlebar height is adjustableto three

different settings (Figure3-6). Ingeneral,

adjust the handlebarsso they are atwaist

levelwhen the tines are 3"-4"in the soil.

To adjustthe handlebars:

1. Stopengine, disconnect spark plug

wire from sparkplug and allow engineto

cool.

2. Removehardware,reposition handle-

bars,and reinstall hardwaresecurely.

Figure3-6:HandlebarheigMadjustment,

Operation

Before operating your machine, care-

fully read and understand all safety

(Section 1), controls (Section 3) and

operating instructions (Section 4) in

this Manual, in the separate Engine

Owner's Manual, and on the decals on

themachine.

Failure to follow these instructionscan

resultin seriouspersonalinjury.

INTRODUCTION

Readthis OperationSectionand the sepa-

rateEngine Owner'sManual beforeyou

start the engine. Then,take the time to

familiarize yourself with the basic opera-

tion of the tiller before using it in the

garden. Findan open,levelareaand prac-

tice using the tiller controls without the

tines engagingthe soil (put tines in

"travel" setting). 0nly after you've

becomecompletely familiar with the tiller

should you begin using it in the garden.

BREAK-INOPERATION

Perform the following maintenanceafter

the first two (2) hours of new operation

(seeMaintenanceSection in this manual

and in the EngineOwner's Manual).

1. Changeengine oil.

2. Checkfor loose or missing hardware

on unit. Tighten or replaceas needed.

3. Checktension on forward drive belt.

4. Checktransmission gear oil level.

STARTINGANDSTOPPING

THEENGINE

Pre-StartChecklist

With the spark plug wire disconnected

from the sparkplug, perform the following

checksand services beforeeach use:

1. Readthe Safetyand ControlsSections

in this manual. Readthe separateEngine

Owner's Manualprovidedwith the unit.

2. Put thewheels intheWHEELDRIVE

position (wheel pins must be through

holesin wheelhubs and wheelshaft).

3. Checkunitfor looseor missing hard-

ware. Serviceas required.

4. Checkengine oil level. SeeEngine

Owner's Manual.

ReverseClutchControl

(Models 634F/634B)

RecoilStarter

Depth

Regulator

•WheelDrivePin

(on eachwheel)

Fig, 4-1

5. Checkthat all safety guardsand covers

are in place.

6. Checkair cleanerand engine cooling

system. SeeEngine Owner'sManual.

GASOLINEIS HIGHLYFLAMMABLEAND

ITS VAPORSAREEXPLOSIVE.

Follow gasoline safety rules in this

Manual (see Section1) and in the sepa-

rate EngineOwner'sManual.

Failuretofollow gasolinesafety instruc-

tions can result in serious personal

injuryandpropertydamage.

7. Fillthefuel tankwith gasoline

according to the directions in the separate

EngineOwner's Manual. Followall

instructions and safety rulescarefully.

8. Attach spark plug wire to spark plug.

StartingtheEngine

Thefollowing stepsdescribe howto start

and stop the engine. Donotattempt to

engagethe tines orwheels untilyou

haveread all ofthe operatinginstruc-

tionsin thisSection. Also, review the

safetyrulesin Section1: Safety,and the

tiller and enginecontrolsinformationin

Section3: Featuresand Controls.

1. Completethe Pro-Start Checklist on

this page.

2. Putthe wheels in the WHEELDRIVE

position (see WheelDrive Pinsin Section

3 of this manual).

To help preventserious personal injury

or damagetoequipment:

• Before starting engine, put both

wheels in the WHEELDRIVEposition.

Never have wheels in FREEWHEEL

position when engine is running.

When the wheels are in FREEWHEEL,

they donot hold backthe tiller and the

tines could propel the tiller rapidly

forwardor backward.

• Before starting engine, put Forward

Clutch Bail (all models) and Reverse

Clutch Control (Models 634F/634B

only)in neutral(disengaged)positions

byreleasinglevers.

• Never run engine indoors or in

enclosed, poorly ventilated areas.

Engine exhaust contains carbon

monoxide,anodorlessanddeadlygas.

• Avoid engine muffler and nearby

areas. Temperatures in these areas

may exceed150OF.

3. Move the Depth Regulator Leverall the

way down to the "travel" position, so that

the tines clearthe ground.

4. Releaseall controls on the tiller.

5. On engine's with a fuel shut-off valve,

turn valveto open position, as instructed

in the separateEngineOwner'sManual.

6. Put ignition switch and/or throttle con-

trol lever locatedon engine in the "ON",

"RUN", "FAST"or "START" position, as

instructed in the EngineOwner'sManual.

7. Chokeor primeengine,as instructed in

EngineOwner's Manual.

8. Putone handon fuel tank to stabilize

unitwhen pulling starter rope handle.

Thenuse recoilstarter to start engine,as

instructed in the EngineOwner'sManual.

Whenengine starts, gradually move choke

lever(if so equipped) to "NO CHOKE",

"CHOKEOFF"or "RUN" position.

9. Usethe "FAST"throttle speedsetting

when tilling.

Keepawayfrom rotatingtines. Rotating

tineswill causeinjury.

StoppingtheEngineand Tiller

1. To stop the wheels and tines, release

the Forward Clutch Bail(all models) or the

ReverseClutchControl (Models634Fand

634B) - whichever control is in use.

2. To stop the engine,putthe ignition

switch and/or the throttle control leverin

the "OFF"or "STOP" position.

OPERATINGTHETILLER

Thefollowing operating instructions pro-

vide guidelinesto using your tiller effec-

tively and safely. Besureto read Tilling

Tips& Techniques inthis Section before

actually putting the tines into the soil.

NOTE:This is atraditional "Standard-

Rotating-Tine"(SRT)tiller with forward

rotating tines. It operatescompletely dif-

ferently from "Counter-Rotating-Tine"

(CRT)tillers or from front-tine tillers.

1. Follow the Pre-Start Checklist atthe

beginning of this Section. Besure that the

wheels are in the WHEELDRIVEposition.

2. Move the Depth Regulator Leverall the

way down, so that the tines clearthe

ground. Usethis position when practicing

with the tiller and whentraveling between

tilling sites. Beforeactually tilling, move

the leverto thedesired depthsetting (see

Tilling Tips & Techniques).

3. Start engineand allow it to warm up.

Thenput throttle in "FAST"setting.

Fig.4-2: Useonehandtoguidetifterwhen

movingforward.

4. For forwardmotion of the wheelsand

tines:

(a) Pull ForwardClutch Bail (Fig. 4-1) up

against handlebar. Releasebail to stop

forward motion of wheels and tines.

(b) Whentilling, relaxand letthe wheels

pull the unit while thetines dig. Walk

behindand a little to one side ofthe

unit. Use one hand,yet keepa light--

but secure--grip on the handlebar

(while keepingyour arm loose). See

Fig.4-2. Letthe unit move at its own

paceand do not push down on the

handlebarsto try and force thetines to

dig deeper-- this takesweight off the

wheels, reducestraction, and causes

the tines to try and propel the tiller.

Do not pushdown on the handlebarsto

try to make the tiller till more deeply.

This preventsthe wheels from holding

the tiller backand can allow the tines

to rapidly propel the tiller forward,

which could result in loss of control,

propertydamage, or personalinjury.

5. Forreverse motion of thewheels and

tines (Models 634F/634B only):

(a) Look behind and exercisecaution when

operating in reverse. Donettill while

in reverse.

(b) Stopall forward motion. Lift handlebar

with onehand until tines are off the

ground and then pull ReverseClutch

Control knob out (seeFig. 4-3). To

stop reversing, let go of ReverseClutch

Control knob.

Fig. 4-3: Raise tinesoffgroundand look

behindwhen movingin reverse.

6. Tomove the Model 630B in reversefor

short distances:

(a) ReleaseForwardClutchBail. Thenlift

handlebaruntil tines are off the ground.

(b) Swing the handlebarto the left sothe

right wheeltakesa "step" backward.

Nextswing the handlebarto the right

so the left wheel"steps" backward.

Repeatas needed.

in reverse,shut off the engine,then

placethe two wheels in FREEWHEEL.

7. To Turn the Tiller Around:

(a) Practiceturning the tiller in a level,

openarea. Bevery careful to keep

your feet and legsawayfrom the tines.

(b) To begina turn, liftthe handlebarsuntil

thetines are out ofthe ground andthe

engineand tinesare balancedoverthe

wheels (Fig.4-4).

handlebarto steer in direction of turn

(Fig. 4-5). After turning, slowly lower

tines into soil to resumetilling.

Fig.4-4: Tobeginturn,lifthandlebarsuntil

tinesareoutofgroundandunitisbalanced.

Fig. 4-5: Withtinesout ofground,push

handlebarssidewaysto turntiller.

StoppingtheTiller and Engine

1. To stop thewheels and tines, release

the Forward ClutchBail (all models) or the

ReverseClutchControl (Models634Fand

634B) -whichever control is in use.

2. To stop theengine, put the ignition

switch and/orthe throttle control leverin

the "OFF"or "STOP" position.

TILLING TIPS & TECHNIQUES

Before tilling, contact your tele-

phone or utilities company and

inquire if undergroundequipment

or lines are used on yourproperty.

Do not till near buried electric

cables, telephone lines, pipes or

hoses.

• Avoidpushingdownon the handlebarsin an attemptto force thetiller to dig deeper. Doing

so takesthe weight off the poweredwheels,causingthem to lose traction. Without the

wheels helping to hold the tiller back, the tines will attempt to propel the tiller - often

causingthetiller to skip rapidlyacrossthe ground. (Sometimes,slight downwardpressure

on the handlebarswill help get through a particularly tough section of sod or unbroken

ground,but in mostcasesthis won't benecessary.)

• Avoidtrying to dig too deeplytoo quickly, especiallywhen busting sodor whentilling soil

that hasn't beentilled for sometime. Useshallowdepthregulatorsettings (onlyan inchor

two deep)forthefirst passesthroughthesoil. Witheachsucceedingpass,dig anotherinch

or two deeper. (Wateringtheareaa few days prior to tilling will maketilling easier,aswill

lettingthenewlyworkedsoilset for adayor two beforemakingafinal, deeptilling pass.)

• Whencultivating (breakingup surfacesoil around plants to destroyweeds,seeFig.4-9), adjustthe tines to dig only 1"to 2"deep.

Usingshallowtilling depthshelpspreventinjuryto plantswhoserootsoften growcloseto thesurface. If needed,lift up on thehandle-

barsslightlyto preventthetinesfrom diggingtoo deeply. (Cultivatingona regularbasisnotonly eliminatesweeds,italso loosensand

aeratesthesoil for bettermoistureabsorptionand fasterplantgrowth.)

With experience,youwill find the "just right" tilling depthand tilling speedcombinationthat is best

for yourgarden.

Setthe enginethrottle leverat a speedto give theengineadequatepowerandyet allow it to operateat the slowest possiblespeed...at

least until you haveachievedthe maximumtilling depth you desire. Fasterenginespeedsmay be desirablewhen making final passes

through the seedbedor whencultivating. Selectionof the correct engine speed,in relationto the tilling depth, will ensurea sufficient

powerlevelto dothejob without causingtheengineto labor.

While tilling, relaxand letthe wheels pull

the tiller along while the tines do the dig-

ging. Walk on the sidethat is not yet fin-

ished (to avoid making footprints in the

freshly tilled soil) and lightly, butsecurely

gripthe handlebarwith just onehand.

Whenever possible, walk on the untilled

sideof the unit to avoidmakingfootprints

in your freshly tilled or cultivated soil.

Footprintscausesoil compactionthat can

hamperroot penetrationandcontributeto

soil erosion. They can also "plant"

unwanted weed seeds back into the

freshlytilledground.

Tilling wet soil often resultsin large, hard

clumps of soil that can interfere with

planting. If time permits,waita dayor two

after heavy rains to allow the soil to dry

beforetilling. Testsoilby squeezingit into

a ball. If it compressestoo easily,it is too

wetto till.

• Whenpreparinga seedbed,go overthe samepathtwice in the first row, then

overlap one-half the tiller width on the rest of the passes (see Fig.

4-6). Whenfinishedin onedirection,makea secondpassat a right angle,as

shown in Fig.4-7. Overlapeachpassfor best results(in very hard ground,it

maytakethreeor four passesto thoroughlypulverizethesoil.)

• If the garden size will not permit

lengthwise and then crosswise

tilling, then overlapthe first passes

by one-half a tiller width, followed I_

by successive passes at one-

quarterwidth (seeFig.4-8).

Fig, 4-8

Fig.4-6

With planning, you can

Fig.4-7

allow enough room _.r_, _,.P,_

between rows to cultivate II_11 • II _ II

(seeFig.4-9). Leaveroom |_l_l <9I

for the hood width, plus 1< 1o1 1

enoughextra roomfor _ "._,_

future plantgrowth. Fig.4-9

TILLING TIPS & TECHNIQUES (cont.)

Powercompostingsimplymeanstilling underand buryinginthesoil all mannerof

organicmattersuchascrop residues,leaves,grassclippingsandcovercrops. This

materialwill decomposeduring thenon-growingseasonandadd importantnaturalnutri-

entsto thesoil.

Thefirst placeto beginiswith crop residuessuchas leftovervines,stalks,stemsand

roots. Powercompostthesecropresiduesas soonastheyfinish bearing.Thesooner

this isdone,the better,astendergreenmatteriseasierto till under. Usethedeepest

depthregulatorsettingpossiblewithoutcausingtheengineto laboror thetiller tojump

ahead.

Standingcornstalksof reasonableheightcanbepowercomposted. Pushingover (but

notuprooting)cornstalkswill oftenmakeiteasierto chopupthestalks. Keepthetines

clearofexcessivetanglingby"fishtailing"or frequentlyusingreverse.Makeseveral

passes,thenreturnafew dayslaterto finish off anyremainingstubble.

When power composting,do not keep

the Depth Regulator Lever at a deep

settingif thetiller jumpsor bucks.

If jumpingor buckingoccurs,movethe

Depth Regulator Lever down to a

shallow setting and then slowly

increase the tilling depth on later

passes.

Failure to follow this warning could

resultin personalinjury.

Aftertilling undercrop residues,add moreorganicmattersuchas leaves,grassclippingsandevenkitchenscraps. Whentilled intothe

soil, this organicmatterwill decomposeandaddevenmoreimportantnutrientsto thesoil.

After powercomposting,you maywant to planta "green manure"covercropto protectthesoil during theoff-season.Yousimply

grow acrop ofclover,alfalfa,buckwheat,peas,beans,ryegrass,grain,or kaleandthentill it intothe soil priorto the plantingseason.

Read thefollowingrecommendationsbeforetilling onslopes:

If you must garden on a moderate slope, please follow two very important

guidelines:

1.Till only on moderate slopes, neveron steepground where footing is difficult

(reviewsafetyrulesin Section1:Safetyof this manual).

2. Werecommendtilling up anddown slopesratherthan terracing. Tillingvertically

on a slopeallowsmaximumplantingareaandalsoleavesroomfor cultivating.

IMPORTANT:Whentilling on slopes,be surethe correctoil levelis maintainedin

the engine(checkevery one-half hour of operation). The incline of the slopewill

causethe oil to slant awayfrom its normalleveland this canstarveengine partsof

requiredlubrication. Keepthe motor oil levelatthefull pointat all times!

Tilling Upand DownSlopes(VerticalTilling)

• To keepsoil erosionto a minimum, besure to add enoughorganicmatterto the

soil sothat it hasgood moisture-holdingtextureandtry to avoidleavingfootprints

or wheelmarks.

• When tilling vertically, try to makethe first pass uphill as the tiller digs more

deeplygoing uphill than it doesdownhill. In soft soil or weeds,you may haveto

lift the handlebarsslightlywhile going uphill. Whengoing downhill, overlapthe

first passbyaboutone-halfthewidth ofthetiller.

Do not operate tiller on a slope too

steep for safe operation. Till slowly

and be sure you have good footing.

Never permit tiller to freewheel down

slopes. Failure to follow this warning

couldresultin personalinjury.

Tilling AcrossSlopesWithoutUsing

Terraces(HorizontalTilling)

• If vertical or terracing gardening aren't

practicalfor you, then you can till laterally

acrossa slope. Wedon't recommendthis

methodasit cancreateunsurefooting and

invitessoilerosion.

• As in terrace gardening,start at the top of

the slopeand overlapthe first pass by half

the width of the tiller. Foraddedstability of

thetiller, alwayskeepthe uphillwheelinthe

soft, newlytilledsoil.

TerraceGardening

• Whena slopeis too steepor too short for verticaltilling, it maybe necessaryto till acrossthe slopeand createterracedrows. Ter-

racesare rowsthatare cut intothesideofa slope,creatinga narrow, butfiat areaon whichto plant.

• Ona longslope,youcanmakeseveralterraces,one belowtheother.

• Terracesshould beonly 2-to-3 feet wide. Diggingtoo far intothe sideof theslopewill exposepoor subsoilthat is unproductivefor

plants.

TILLING TIPS & TECHNIQUES (cont.)

TerraceGardening(continued)

•To createa terrace,start at the top of the slopeand work down.Go backand forth 0_'_

acrossthe first rowas shownin Fig.4-10. _,_O

• Each succeeding lower terrace is started by walking below the terrace you're O]_il "z)

preparing. Foraddedstability of the tiller, alwayskeepthe uphill wheel in the soft,

newlytilled soil. Do nottill the last 1T or moreof the downhilloutside edgeof each O]_[r_,EPEAT

terrace. This untilled strip helps prevents the terraces from breaking apart and

washingdownhill. Italso providesawalking pathbetweenrows. Fig.4-10

Thetines havea self-clearingaction which eliminatesmosttanglingof debrisin

the tines. However,occasionallydry grass,stringy stalks or tough vines may

becometangled. Followthese proceduresto help avoid tanglingand to clean

thetines, if necessary.

• To reducetangling, set the depth regulator deep enough to get maximum

"chopping" actionasthe tines chopthe materialagainsttheground. Also,try

to till under crop residuesor cover crops while they are green, moist and

tender.

• While powercomposting,try swayingthe handlebarsfrom sideto side (about

6"to 1T). This"fishtailing" actionoftenclearsthetinesof debris.

• If tanglingoccurs, lift the tines out of the soil and run the tiller in reverse(if

unit is equippedwith poweredreverse)for a few feet. This reversingaction

shouldunwindagood dealof debris.

• It may be necessaryto removethe debris by

hand (a pocketknife will help youto cut away

the material). Be sure to stop the engineand

disconnectthe spark plug wire beforeclearing

the tinesby hand.

Beforeclearingthe tines by hand, stopthe

engine, allow all movingpartsto stop and

disconnectthe sparkplugwire. Removethe

ignitionkeyonelectricstartmodels.

Failureto followthiswarningcouldresultin

personalinjury.

LOADINGANDUNLOADING

THETILLER

Loading and unloading the tiller into a

vehicle is potentially hazardousand we

don't recommenddoingso unlessabso-

lutely necessary,as this could result in

personalinjuryor propertydamage.

However, if you must loador unloadthe

tiller, followthe guidelinesgivennext.

• Beforeloading or unloading, stop the

engine,wait for all parts to stop moving,

disconnect thespark plugwire and let

the engine and muffler cool.

• Thetiller istoo heavyand bulky to lift

safelyby one person. Two or more

peopleshould sharethe load.

• Usesturdy ramps and manually (engine

shut off) rollthe tiller into and out of the

vehicle. Two or more peopleare needed

to do this.

*The ramps must bestrong enough to

support the combined weight of thetiller

and any handlers.The ramps should pro-

vide good traction to preventslipping;

they should haveside rails to guide the

tiller along the ramps;and they should

havea locking deviceto secure them to

the vehicle.

• Thehandlersshould wearsturdy footwear

that will helpto preventslipping.

• Positionthe loading vehicle sothat the

rampangle is asflat as possible (the less

inclineto the ramp, the better). Turn the

vehicle's engineoff andapply its parking

brake.

• Whengoing upramps, stand in the

normal operatingposition and pushthe

tiller ahead ofyou. Havea personat

eachsideto turn the wheels.

• Whengoing down ramps,walk backward

with the tiller following you. Keepalert

for any obstacles behind you. Position a

person ateachwheelto control the

speedof thetiller. Nevergo down ramps

tiller-first, asthe tiller could tip forward.

• Placewooden blockson the downhill

side ofthe wheels if you needto stop the

tiller from rolling down the ramp. Also,

usethe blocks to temporarily keepthe

tiller in placeonthe ramps (if neces-

sary), and to chock the wheels in place

after the tiller is in the vehicle.

• After loading thetiller, prevent it from

rolling byengaging the wheels in the

WHEELDRIVEposition. Chockthe

wheels with blocks and securelytie the

tiller down.

Maintenance

Before inspecting, cleaning or

servicingthe machine, shot off engine,

wait for all moving parts to come to a

complete stop, disconnect spark plug

wire and move wire away from spark

plug. Remove ignition key on electric

startmodels.

Failure to follow these instructionscan

resultin seriouspersonalinjuryor prop-

ertydamage.

MAINTENANCESCHEDULE

PROCEDURE NOTES

Checkmotoroillevel 2,3

Cleanengine 2,7

Checkdrivebelttension 1,4

Checknutsandbolts 1,4

Changemotoroi_ 4,6,9

Lubricatetiller 4

Serviceengineaircleanersystem 7

Checkgearoil levelintransmission 1,5

Checktinesforwear 5

Checkairpressurein tires(ifunit

haspneumatictires) 5

Servicesparkptog 7

NOTES

1 - Checkafterfirst 2hoursofbreak-inoperation,

2 -Beforeeachuse.

3 - Every5operatinghours,

4 - Every10operatinghours,

5 - Every30operatinghours,

6 - Changemorefrequentlyin dustyor dirty

conditions,

7 - SeeEngineOwner'sManua!forservice

recommendations.

8 - Whichevertimeintervaloccursfirst,

9 - Changeafterfirst2hoursofbreak-in

operation,

TILLERLUBRICATION

After every 10 operating hours, oil or

greasethe lubrication points shown in

Figure5-1 and described below.

Usecleanlubricating oil (#30 weight

motor oil is suitable) and cleangeneral

purposegrease(greasecontaining a metal

lubricant is preferred, if available).

• Removethewheels, cleanthe wheel

shaft (A, Fig. 5-1) and applya thin

coating of greaseto the wheel shaft.

• Greasethe back,front and sides of the

depth regulator lever (B,Fig. 5-1).

• Removethetines and cleanthe tine shaft

(C, Fig. 5-1). Usea file or sandpaperto

gently removeany rust, burrs or rough

spots (especiallyaround holesin shaft).

Apply greaseto endsof shaft before

installing tines.

• Oilthethreads on the handlebarheight

adjustment screws andthe handlebar

attaching screws (D, Fig.5-1).

Figure5-1

CHECKFOROILLEAKS

Beforeeach use,checkthetiller for signs

ofan oil leak- usuallya dirty, oily accu-

mulation either on the unit or on the floor.

A little seepagearounda cover or an oil

sealis usually not a causefor alarm. How-

ever, if the oil drips overnight,then imme-

diateattention is needed. Ignoring an oil

leakcanresult in severe transmission

damage!

If a cover is leaking,checkfor loose

screws. If the screws are tight, a new

gasket or oil seal maybe required.

If the leakisfrom around a shaft and oil

seal,the oil seal probably needsto be

replaced. Seeyour authorized dealer or

contact thefactory for serviceor advice.

IMPORTANT:Neveroperatethetiller ifthe

transmission is low on oil. Checkthe oil

levelafter every30 hours of operationand

whenever there isany oil leakage.

CHECKHARDWARE

Checkfor looseor missing hardwareafter

every 10 operating hoursand tighten or

replace(as needed)beforereusingtiller

Besureto checkthe screws underneath

the tiller hood that securethetransmission

cover and the Depth RegulatorLeverto the

transmission.

CHECKTIRE PRESSURE

(Modelswith pneumatictires)

Checktheair pressurein both tires. The

air pressure should be between 15-20 PSI

(pounds per square inch).

Keepbothtires equally inflated to help

prevent machinefrom pullingto one side.

TRANSMISSIONGEAR

OILSERVICE

Checkthetransmission gear oil levelafter

every 30 hours of operation or whenever

you noticeany oil leak. Operatingthetiller

when thetransmission is low on oil can

result in severedamage.

A. To ChecktheTransmission

GearOil Level:

1. Checkthe gear oil levelwhen thetrans-

mission is cool. Gearoil will expandin

warm operatingtemperatures and this

expansion will providean incorrect oil

levelreading.

2. With the tiller on levelground, pull the

Depth RegulatorLeverall theway up.

3. Removethe oil fill plug (A, Fig.5-2)

from thetransmission housing and look

insidethe oil fill holeto locatethe main

drive shaft situated below the hole.

_ efore inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

cometo a complete stop, disconnectspark plug wire and move wire awayfrom spark plug.

Failure to follow these instructionscan result in serious personal injury or propertydamage.

4. Thegear oil levelis correct if the gear B. To Drainthe TransmissionGearOil: BOLOTINES

oil isapproximately halfwayup the side of

the maindrive shaft.

5. If the gear oil level is low, add gearoil

as described next. If the gear oil level is

okay,securelyreplacethe oil fill plug.

IMPORTANT:Do not operatethe tiller if

the gear oil levelis low. Doing sowill

result in severedamageto thetransmis-

sion components.

Thetransmission gear oil does not needto

bechangedunless it hasbeencontami-

natedwith dirt, sandor metal particles.

1. Drain gasolinefrom the fuel tankor run

the engine until the fueltank is empty. See

"DANGER"statementbelow.

Gasoline is highly flammable and its

vapors are explosive. Follow these

safety practices to prevent personal

injury or property damage from fire or

explosion.

• Allow the engine and muffler to cool

for at least two minutes before

drainingthetiiler's gasolinetank.

• Do not allow open flames, sparks,

matchesor smokingin the area.

• Wipe away spills and pushtiller away

from spilledfuel.

• Use only an approved fuel container

and store it safely out of the reach of

children.

Figure5-2: Removeoilfillplug(A)tocheck

gearoillevelandtoaddgearoiL Remove

fourcoverscrews(B)todraingearoil.

6. If adding only a few ounces of gear oil,

useAPI ratedGL-4 or GL-5 gearoil having

a viscosity of SAE140,SAE85W-140 or

SAE80W-90. If refilling an empty trans-

mission, useonly GL-4 gear oil havinga

viscosity of SAE85W-140 orSAE140.

IMPORTANT:Donot useautomatic trans-

mission fluid or motor oil in the transmis-

sion.

7. While checkingfrequentlyto avoid

overfilling, slowly add gear oil into the oil

• Do not storegasolinein an area where

its vaporscould reach an open flame

or spark, orwhere ignitionsourcesare

present (suchas hotwater and space

heaters, furnaces, clothes dryers,

stoves,electricmotors,etc.)

2. Drainthe oil from the engine.

3. Removefour screws (B,Figure5-2) and

removetransmission coverand gasket.

4. Removethe left-sidewheel.

5. Tilt the left-sidewheel shaft into a drain

panand allow the gear oil to drain through

the top of the transmission.

6. Reinstallthe wheel.

fill hole until it reachesthe halfwaypoint

on the drive shaft. 7. Installa newgasket(do not reuseold

gasket)and reinstall thetransmission

8. Securelyreplacethe oil fill plug. cover.

8. Refillthe transmission using GL-4gear

oil (SAE85W-140 or SAE140).

9. Refill the enginewith motor oil and

replenishthe fuel tank with gasoline.

Thebolo tines will wear with useand

should be inspectedatthe beginning of

eachtilling seasonand after every 30

operating hours. Thetines can be

replacedeither individually or asa com-

pleteset. Seethe PartsList pagesfor tine

identification and part numbers.

A. Tine Inspection:

With use,the tines will becomeshorter,

narrower and pointed. Badlyworn tines

will result in a loss of tilling depth, and

reducedeffectivenesswhen chopping up

andturning under organic matter.

B. Removing/Installinga Single Tine:

1. With theengine shut oft and the spark

plug wire disconnected,remove thetwo

screws (A, Figure5-3), Iockwahers(E)and

nuts (B) that attach a singletine to a tine

holder. If needed,usepenetrating oil on

the nuts.

2. When installing a single tine, be sureto

position it so that its cutting edge (sharp)

will enterthe soil first as the tiller moves

forward.

C. Removing/Installinga TineAssembly:

1. A tine assembly consists of eight tines

mounted on atine holder.

2. If removing both tine assemblies,mark

them "left" and "right" beforeremoval.

Removethe screw (C, Figure5-3), lock

washer (E) and Iocknut (D) that securethe

tineassembly to the tine shaft. If neces-

sary, usea rubber mallet to tapthe tine

assemblyoutward off the shaft.

3. Beforereinstalling the tine assembly,

inspectthe tine shaft for rust, rough spots

or burrs. Lightly file or sand, as needed.

Applya thin coat of greaseto the shaft.

4. Installeachtine assembly so that the

cutting (sharp) edge of the tines will enter

the soil first whenthe tiller moves

forward. Securethe tine assemblyto the

tine shaft using the screwand Iocknut

previously removed.

_Betore inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

I l Icometeacomplete stop, disconnectsparkplug wire and movewire awayfrom spark plug.

I !lmK_ IFailure tofollow those instructionscan result in serious personal injury or propertydamage,

_NE

SHAFT

ENGINE

Figure5-3: Installtinessothatcuttingedgeoftinesentersoilfirstwhentillermovesforward.

CHECKINGANDADJUSTING

FORWARDDRIVEBELTTENSION

It is important to maintain correcttension

on theforward drive belt. A loosebelt will

causethetines and wheels to slow down-

or stop completely - eventhough the

engine is running at full speed. A too tight

belt can result in unintentional tine move-

ment when the clutch bail is in the Neutral

(released)position.

• Checkbelt tension after the first two

hours of break-inoperationand after

every 10 operating hours

• Atthe end of eachtilling season,check

the beltfor cracks,cuts or frayed edges

and replaceit assoon as possible

measurementis between 1/16"-to- 3/16'

longer thanthe first measurement

4. If thespring istoo short (less than

1/16"),the tension istoo loose. If the

spring istoo long (more than 3/16"), the

tension is too tight.

5. Toadjust the lengthof the spring:

a. Releasethe Forward ClutchBail.

b. Unthreadthe hex nut (C, Figure5-4)

about halfwayup the adjustment

screw (D).

c. Unhookthe top of the spring from

the ForwardClutch Bail.

d. Usepliers to preventthe adjuster (B)

from turning and turn the slotted

screw located inside thespring

clockwise (viewedfrom operator's

position) to increasetension on the

spring. Turnthe screw counter-

clockwise to decreasetension. Once

adjusted, reattachthespring to the

ForwardClutch Bail.

e. RepeatSteps2 and3 to re-measure

the lengthof the spring. Whenthe

secondmeasurementis between

1/16"-to- 3/16" longerthanthefirst

measurement,retightenthe hexnut

(C)againstthetop of theadjuster (B).

ReplacementBeltInformation

If the drive belt needsto be replaced,see

your localauthorized dealeror referto the

Parts List for ordering information. Use

onlya factory-authorized beltas an "over-

the-counter" belt may not performsatis-

factorily. The procedurerequiresaverage

mechanicalability and commonly available

tools.

ToCheckForwardBeltTension:

1. Stop engine,wait for all partsto stop

moving and disconnect spark plugwire.

2. With the Forward ClutchBail in an

open (released)position, measureand

notethe overall length of the cablespring

(A, Figure5-4) by measuringfrom the out-

ermost coil to the outermost coil.

3. Squeezethe Forward Clutch Bail

againstthe handlebar(seeFigure5-4) and

re-measurethe length of the coils The

belttension is correct if this second

Figure5-4: Tocheckforwardbelttension,taketwomeasurementsof

theoveralllengthofthecoilsinthespring- firstwiththeclutchbail

open,thenwiththeclutchbailclosedagainstthehandlebar.

_ eforeinspecting,cleaningor servicingthe machine,shutoffengine,wait for all movingpartsto

cometoa completestop,disconnectsparkplugwireandmovewireawayfromsparkplug.

Failuretofollowtheseinstructionscanresultin seriouspersonalinjuryorpropertydamage.

FORWARDCLUTCH

BAILADJUSTMENT

If the ForwardClutch Bail doesnot func-

tion properly, first checkthat the forward

drive belt isadjusted properly (see

Checkingand Adjusting Forward Drive

Belt Tension). If this fails to correct the

problem, contact the factory Technical

ServiceDepartment or your authorized

dealerfor serviceadvice.

CHECKINGANDADJUSTING

REVERSEDRIVE BELTTENSION

(Models 634F/634B only)

It is important to maintain correct tension

on the reversedrive belt. A loosebeltwill

causethetines and wheelsto slow down-

or stop completely - eventhough the

engine is running at full speed.

When checking belttension, also check

the belt for cracks,cuts or frayed edges

and replaceitas soon as possible.

• Checkbelttension afterthe first two

hours of break-in operationand after

every 10 operating hours.

To CheckReverseBeltTension:

1. Stop engine,wait for all partsto stop

moving and disconnect spark plug wire.

2. Removescrew in plastic beltcover and

slide beltcover (which isattachedto for-

ward clutch cable)out ofthe way.

3. Havean assistant pull the Reverse

ClutchControl knoball theway out and

hold it in that position. Measurethe

length ofthe cablewire betweenthe end

of thethreaded cableadjuster (A, Figure5-

5) and the end of the z-fitting (B)to which

the cablewire is attached.

4. Thebelttension is ideal if the cablewire

lengthmeasuresbetween1/8"to 1/4". If it

is lessthan 1/8" (andifthere is no reverse

action when thetiller is running), then

makethefollowing adjustments.

NOTE:If the length is morethan 1/4", no

adjustment is needed--as long asthe

reverseaction functions properly.

5. Releasethe ReverseClutchControl

knob.andthen unthreadthe inner jam nut

(C,Figure5-6) oneto two turns. Pullthe

threadedcableadjuster (A, Figure5-6) to

the left until the innerjam nut (C)touches

the bracket.

6. Preventthe inner jam nut (C)from

turning and tighten the outerjam nut (D)

against the bracket. Preventthe outerjam

nut (D) from turning and tighten the inner

jam nut (C)against the bracket.

7. Measurethe gap by repeatingStep3.

Readjustas neededby repeatingSteps5

and 6.

8. Reinstallthe belt cover.

Figure5-5." Measurecable wire lengthto

checkfor correctreversebelt tension.

Figure5-6: Movethreaded

adjuster(A) toleft toincrease

belt tension.

ReplacementBeltInformation

If the drive belt needsto be replaced,see

your localauthorized dealeror refer to the

Parts List for ordering information. Use

only a factory-authorized beltasan "over-

the-counter" belt maynot perform satis-

factorily. Theprocedure requiresaverage

mechanicalability and commonly available

tools.

ENGINECLEANING

Keepingthe engine cleanwill help to

ensuresmooth operationand prevent

damagefrom overheating. Refertothe

EngineOwner's Manualfor engine

cleaningservice intervalsand instructions.

Besure that the muffler is cool beforeser-

vicing theengine.

AIRCLEANERSERVICE

Theair cleanerfilters dirt and dust out of

the air beforeit enters the carburetor.

Operatingthe enginewith a dirty, clogged

air filter cancause poor performanceand

damageto theengine. Neveroperatethe

engine without the air cleanerinstalled.

Inspectand servicethe air cleanermore

often if operating in very dusty or dirty

conditions. Referto the EngineOwner's

Manualfor air cleanerservice intervals

and instructions.

ENGINEOILSERVICE

Checkthe engine oil levelbeforeeach use

and after every 5 hours of continuous

operation. Runningthe enginewhen it is

low on oil will quickly ruin the engine.

It is recommendedthat you changethe

motor oil after every 10 hours of operation

and evensoonerwhen operating in

extremely dirty or dusty conditions. Refer

to the Engine Owner'sManualfor detailed

service instructions.

A. To ChecktheEngineOil Level:

1. Parkthetiller on a levelareaand shut

off the engine.

2. Levelthe engine (usethe Depth Regu-

lator Leverto adjust the engineangle).

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Troy-Bilt 21A-630B063 Owner's manual

Brand: Troy-Bilt

Model: 21A-630B063

Category: Mini tillers

Type: Owner's manual

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